Chain-grate-supporting structure.



W. A. BROWN L J. BRANNN.

CHATN (TRATE SUPPORTING STRUCTURE.

APPLCAT'ON FLED NOV. lgl. 1,295,685. Patented Feb. 25, 1919.

3 SHEETS-SHEET l.

W. A. BROWN 6L I'. BRANNAN.

CHAIN GRATE SUPPORTING STRUCTURE.

APPLmATmN FILED Nov.7.1911.

Patenfed Feb. 25, I9I 9.

3 SHEETS-SHEEI 2.

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UNTTED STATES PATENT oTTioE;

WILLIAM A. BROWN AND JOHN ]3Il'1,ANNA1\'l,` OF DENVER, COLORADO.

CHAIN-GRATE-SUPPORTING STRUCTURE.

Specification of Letters Patent.

Application led November 7, 1917. Serial No. 200,774.

To all whom t may concern:

Be it known that we, WJLLIAM A. BROWN and 'JOHN BRANNAN, citizens of United States residinv at Denver, in the county of Denver and 2tate of Colorado, have invented certain new and useful Improvements in Chain-Grate-Supporting Structures; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled yin the art to which it appertains to make and usethe same.

This invention relates to chain grates and more particularly to supporting structure therefor and has for an object to provide a new and improved structure for supporting a chain grate of any desired or usual and ordinary type whereby the tendency of the usual transverse carrying rollers, the rear` sprocket shaft and its cross beam to sag because of the heat, is eliminated.

A further object of the invention is to provide a new and improved gratesupport ,which facilitates operation of the grate, and

another object is to improveV grate structures Vso'that removal and renewal of parts may be readily accomplished.

With these and other objects in view, the invention comprises certain novel constructions, combinations and arrangement yof parts -as will be hereinafter more fully described and claimed.

In the drawing:

Figure 1 is a side elevation of an improved support,

Fig. 2 is a transverse sectional view taken on line 2--2 of Fig. 1; Fig. 3 is a view in end elevation as indicated by arrow 3 at Fig. 1;

Fig. 4 is a view in end elevation of a chain grate having a number of parallel belts and showing the intermediate longitudinal supports for the rollers and sprocket shafts,

Fig. 5 is a plan view of the supports of a part of the grate shown in Fig. 4, Fig. 6 is a vertical, transverse section of aV single belt grade with intermediate supports for the shaft and rollers,

Fig. 7 is a similar view showing a grate lof two .belts in combination with the improved intermediate support.

A serious defect with chain grates is the tendency they have to sag and bind because of the bending of the transverse main and roller supports. It has been proposed to rest the back sprocket shaft and the rollers upon narrow devices supported at the sides of the grate butv these transverse supports eventually warp and thus throw the partsout `of alinement `and render the grate finopdisposed between ther parallel belts of a chain grate A. Upon the beam 10 are positioned spacers 11, preferably in the form of hollow sleeves and beams or spacers 12 of channel or like construction, which may be provided with bearings as 12 for shaft B.

Upon the spacers 11 and 12 is secured a plate 13a carrying parallel spaced angle irons Y Patented Feb.25,i919.

13 and such angle irons, spacers and beams are connected together in any approved manner as by the use of bolts 14.

Clamp'ed end to end between the angle irons 13, a plurality of upright plates 16 are employed, being secured in any approved manner as by the bolts 17. The

blocks intermediate the ends of the structure which are subjected to the greater heat and therefore require a greater amount of repair are made in comparatively short lengths and interchangeable so thatk they may be replaced at any time quickly, conveniently and cheaply. The end plates 18 and 19 are also similarly bolted between the angle irons but by reason of the requirement of the ends of the structure, do not correspond to the intermediate blocks.

The angle irons 13 'are provided with journal bearings 2O while the beam 10 is likewise provided with journal bearings 21 in which are journaled the inner ends of rollers 22 carrying the traveling grate structure on both its upper and lower stretches. The lower corners of the plates 16 are cut away yto clear the upper rollers.

The grate structure, in the present instance, is indicated conventionally at A in Fig. 8 and by vdotted lines at A in Fig. 4. It is intended to represent any usual and ordinary type of traveling grate structure and sprockets 25 are employed to correspond to the mechanism ofthe grate structure, the sprockets shown in the 4drawing .being only indicative.

An entire ,central support as thus .described is mounted yupon rollers 26 which in turn, operate upon rails 27 secured .to ythe y bottom of the ash pit and Yextending out ,into

the fire room so .that .it may be ,readily movedout into the lire rooin for the purpose .of repairs.

The present intermediate support makes possible the use of comparatively short .rollvers 22 which have been Vfound to be points -of weakness .in ordinary traveling grate Vstructures where long ,transverse rollers and .shafts Iare .employed .and supported :only at 4the v side of the grate and which become warped and buckled from the action o f the heat. 'The several vflights o f grate barsare also separated by the plates `16 so that each flight may be driven at an independent speed as maybe found desirable Yby reason Yof its locationin the fire box o r other necessities v0f lire, lthe adjacent ends of `'the bars ,are fprevented from interlocking. The liller plates 16 projecting .up between the innerends ofthe bars of a grate A not only serve f to guide and Valinethe barslbut also lill the space necessary to prevent the bars from jamming Yand alsoprevent coals 4from falling between the grate ends.- An entire grate may consist eof as `many parallel belts as ,may be desired, each belt being supported, at its edge adjacent another belt, -upon a support preferabl ,es described.

le have herei .efO1e. cl escribed thegrate supporting rollers as having ytheir ends vjouriialed in our :improved supporting members lii this regard We wish i,to explain that in some 'grates these rollers consist of a solid ooreor rofl :Xedly mounted at .eeeh vside of tliegrate with a rolling or revolvingsleeve thereon. 111 oase. of suoli .Construction the .rod oreoreiieedrot be .eut'butmany maybe solid .and `oorlifrnous .from one .side fof Vtbe grateto .the other, passing through `our supporting ,members at the point indicated ,in .the drawings for .the journaling of the ends .of .tbe rollers. In such a oase the .re-

.rolvlilig `sleeve which .constitutes the ,roller proper may v.have Vits .ends revolubly jour- Vnailed ,incur .improved supporting members vor [may .be .out 'short thereof the .jourlnaliiig" eliminated, .the 'roller lin suoli ease gaining its support simply from .passing of ,tbe por red tbroiigb the mproved supporting members. The form of the construction at this point is immaterial as the construction of our improved support and sprocket shafts and idler rollers jour? iialed interinediately of the Width of the grate in said supporting `gii'der.

2. A traveling grate support comprising spaced sprockets Vand .their shafts, transverse carrying .rollers arranged between the sprockets, a centi-.al carriage arranged longitudinally of the grate and supporting ythe shafts and said rollers, -a track, and'wheels for the carriage lbearingl upon the track fal. cilitating bodily movement of ,the assembled parts.

3. A chain grate having, in .combinatiom a plurality of parallel belts of'barfs; chain sprockets and their shafts, and supporting rollers arranged between the sprockets to support the belts; and a centralcalrage between lthe .adjacent edges of the belts fin which :the shafts and rollers are jOuIIlalefd, 4tbe A,Carriege ,having en upright .filler and guidefbetweell the adjacent ends of thelgrate bars. a Y

4- A Chain grate baring, in combination, .a plurality of parallel ,belts of bars.; @bein sprocket-sand their shafts., andsupportng rollers ,arranged between the sprockets ,to supporty the belts; arida central carriage beytween the adjacent edges of the belts in l which the shafts and rollers yare j ournaled, the carriage having an :upright filler ,and guide between theadjaceut ends of the grate bars, the filler terminating at the top plane of the belts.

5. A chain grate having, in combination, a.- plurality of parallel belts of transverse `grate' bars; carrying sprockets and 7their shafts; supporting rollers lmounted at intervals between the sprockets to fpreventsag-Y ging ofthe belts, va c arriagebetween the adjacent edges of `the belts and 4j.ournaling the shafts and the adjacent ,ends of the said rollers. i .6.. A .elisir ,grate .oarryngsprockets `and their shafts, supporting rollers located at fixed distances between the sprockets to support Ythe belts, e

Vhaving combination, i a plurality olf parallel b eltsfof grate bers,

longitudinal girderstrueturebetweenthe ad-l jaeent edges of the jbe'lts and supporting the Sprocket shafts and the adjacent endsol seid rollers, and means for supporting saidv .struoture- Y 7 .A chain grateibaving ir Combination, e

plurality 'of 'parallel belts of grate bars, oalryuig sprockets Ytheir shafts, supporting rollers upon and over which the belts travel, a longitudinal girder structure between the adjacent edges of the belts in which the sprocket shafts and the ends of said rollers are journaled, and means beneath said structure for supporting the same.

8. A chain grate having in combination, a plurality of parallel belts of grate bars, carrying sprockets and their shafts, supporting rollers to carry the belts, a longitudinal girder structure between the adjacent edges of the belts, and means for movably supporting said structure, said girder jour' naling the sprocket shafts and rollers.

9. A chain grate having in combination, a plurality of parallel belts of grate bars, carrying sprockets and their shafts, supporting rollers to oarrythe belts, a longitudinal girder structure between the adjacent edges of the belts and upon which said shafts and rollers `are journaled and means for supporting said structure, said girder provided with a partition comprising a plurality of interchangeable plates interposed between the adjacent ends of the grate bars. y

In testimony whereof we aiiiX our signatures in presence of two witnesses.

i WILLIAM A. BROWN.

JOHN BRANNAN.

Copies of this patent may be obtained for iive cents each, by addressing the Commissioner of Patents, Washington, D. 

